Responsive check isn't correct

[soulgalore]

The way we check if a page is responsive isn't correct:
https://github.com/sitespeedio/coach/blob/master/lib/dom/info/responsive.js

It will only work if the width of the browser window is small, then it's correct. Would be cool of course to know this even when the browser window width is bigger.

[soulgalore]

We should validate and check if this is still true. Is it a better way of doing this?

[sumeetrohra]

@soulgalore we can use the same check for multiple viewports, then even if 1 of them is not responsive, the site is not responsive, that should work. Should I start doing that?

[soulgalore]

No I think we don't wanna change the viewport since it potentially could trigger other things (like downloading images that before was out of viewport but now become within the viewport). Maybe there are no good way of doing this, then I guess we can skip it,